Sharp 21KF-80S User manual

1
21KF-80S
GA-1E CHASSIS
SERVICE MANUAL
SHARP CORPORATION
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
This document has been published to
be used for after sales service only.
ELECTRICAL SPECIFICATIONS ..................... 3
IMPORTANT SERVICING NOTES .................. 4
CONTROLS & TERMINALS ............................. 5
ADJUSTMENT PROCEDURES ...................... 6
HOTEL MODE FUNCTIONS .......................... 12
LED FLASHING CODE ...................................13
CHASSIS LAYOUTS .......................................14
PRINTED WIRING BOARDS ........................... 15
ICs ADDITIONAL INFORMATION ..................20
SCHEMATIC DIAGRAMS .............................. 27
BLOCK DIAGRAMS ....................................... 33
TROUBLESHOOTING TABLES ...................... 36
PARTS LISTING ............................................. 39
SOURCE OF DOCUMENTATION ................. 43
CONTENTS
MODEL 21KF-80S
Issued: 18th Feb. 2003
PAL B/G SYSTEM COLOUR TELEVISION
SE0021KF80S00

2
21KF-80S
Service Manual update log sheet
Part No.
Technical Report No.
Technical Bulletin No. Cause / Solution Page No. Application
Data /Serial No.
Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc.
If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
If you need more information, please refer to the Technical Report (Bulletin).

3
21KF-80S
ELECTRICAL SPECIFICATIONS
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and
power receptacle, when servicing this chassis.
To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel.
Specifications are subject to change without prior notice.
•Power Input .................... 220V-240 Volts AC 50Hz
•Power Consumption
Normal Operation (Method IEC60107) ........ 49W
Stand-by Operation .................................. 3W
•Audio Power Output Rating .............. 4W x 2 (MPO)
•Speaker ......................... 16Ω4W, 12 x 5 cm, 2pcs
•Convergence ................... Self Converging System
•Focus ............................... Bi-Potential Electrostatic
•Sweep Deflection ..................................... Magnetic
•Picture Intermediate Frequency .............. 38.9MHz
•Sound Carrier Trap .............................. 33.4MHz
•Adjacent Sound Carrier Trap ................ 40.4MHz
•Adjacent Picture Carrier Trap .............. 31.9MHz
•Aerial Input Impedance
VHF/UHF .................... 75 ohm Unbalanced
•Tuning Ranges ......... 48.25MHz thru 855.25 MHz
VHF ....................... CH02-CH12
S1-S41 (HYPERBAND)
UHF ....................................... CH21 - CH69
•White Level
Set the brightness control, with no signal connected, so that the CRT cathode current is 600µA. The maximum
correction applied to each cathode current to achieve a screen temperature of 8550 degrees K+1 MPCD should
not exceed 15% of its original value.
X=0.290 ± 0.015 Y=0.300 ± 0.015

4
21KF-80S
IMPORTANT SERVICING NOTES
Only qualified service personnel are allowed to carry out maintenance and repair of this receiver.
Servicing of high voltage system and CRT
It is important that the static charge is removed from the high voltage system when carrying out work on the
receiver. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from the CRT cavity
connector to the CRT ground tag. This must be carried out with the AC supply disconnected from the receiver.
Note the following:
•The CRT in this receiver employs Integral Implosion Protection.
•If the CRT has to be changed it MUST be replaced with the correct type for continued safe working
•DO NOT lift the CRT by its neck.
•When handing the CRT, ensure that shatterproof goggles are worn.
•Ensure that the CRT is discharge before handling.
X-Ray
This receiver is designed to keep any x-ray emission to an absolute minimum. Some fault conditions and
servicing procedures may produce potentially hazardous x-ray radiation levels. This is a problem when in close
proximity to the receiver for long periods of time. To reduce any risks associated with this, please observe the
following precautions:
1. When undertaking any servicing on this chassis, DO NOT increase the EHT to more than 31.0 KV,
(at a instantaneous beam current of 1200µA).
2. Ensure that during normal operation the EHT does not exceed 27.5 KV±1.5KV (at a beam current of
1050µA). This level has been preset in the factory. Always check that this level has not been exceeded after
carrying out any repair on the receiver.
3. DO NOT replace the CRT with any other type than that specified in the parts listing as this may
cause excessive x-ray radiation.
Before returning the receiver to the customer
In addition to the above checks, the following should also be carried out before returning the receiver to the
customer.
1. Inspect all the leads to ensure that they are dressed correctly and that they are not obstructed or
pinched by any other parts.
2. Ensure that all protective devices are in good condition. These will include nonmetallic control
knobs, insulating fish papers, cabinets backs, compartment covers or shields, mechanical insulators, etc.

5
21KF-80S
Power ( ) button
Power/On Timer indicator
Remote Control Sensor
Menu button
Earphone Jack
3.5 mm ø Jack PLUG
Earphone impedance
16 ~ 600 ohm
Volume Up ( )/Down ( ) buttons
Channel Up ( )/Down ( ) buttons VIDEO input terminal
AUDIO input terminals
TV/VIDEO
VCRTV
CH
CH
MENU
LIST
GA006SA
TV / VCR/ TEXT REMOTE CONTROL
123
456
78
0
9
TV
VCR
CH
CALL ()/CHILD LOCK ()button
Infrared Transmitter Window
Aim this window at the infrared sensor
on your TV set
FLASHBACK ( ) button
Returns to previously viewed
programme
TV/VIDEO Select button
POWER/STANDBY ()button
Programme Select buttons
MENU button
HALF PAGE ( ) button (Teletext)
VOLUME UP ( )/DOWN ( ) buttons
( ) Increases sound
( ) Decreases sound
(These are also used for menu set up)
CANCEL ( ) button (Teletext)
RESET ( ) button (Teletext)
Single/Double Entry button ( )
Text/Mix ()
Select button (Teletext)
COLOUR buttons
REVEAL ()button (Teletext)
TV button (Teletext)
HOLD ()button (Teletext)
CHANNEL (PROGRAMME) UP ( )/
DOWN ( ) buttons
( ) Selects next higher programme
( ) Selects next lower programme
(These are also used for menu
set up)
STORE ( ) button (Teletext)
SOUND MUTE ()button
CLOCK ()button (Teletext)
Sound Mode Select ()button
INDEX ()button (Teletext)
LIST Select button (Teletext)
26
Remote Control
TV Front
Euro-SCART 21-Pin Terminal
1. Audio right output
2. Audio right input
3. Audio left output
4. Common earth for audio
5. Earth for blue
6. Audio left input
7. Blue input
8. Audio-video control
9. Earth for green
10. Not used
11. Green input
12. Not used
21
21 19 17 15 13 11 9 7 5 3 1
20 18 16 14 12 10 8 6 4 2
21-Pin Euro-SCART
13. Earth for red
14. Not used
15. Red input
16. Red/Green/Blue control
17. Earth for video
18. Earth for video
For greater A/V enjoyment, various audio and video devices may be
connected via the Euro-SCART 21-Pin Terminal.
19. Video output
20. Video input
21. Plug shield
CONTROLS & TERMINALS
Note: Stereo Input / Output .

6
21KF-80S
ADJUSTMENT PROCEDURES
Service Mode function
All required adjustments for servicing this TV set, may be done in “service mode”, excepting G2 and FOCUS.
How to access the Service Mode
1. Turn the receiver on and ensure that it is tuned into a test pattern.
2. Turn the receiver off using the mains switch.
3. Press the volume down and channel up buttons together. See Fig.1.
4. Continue pressing the volume down and channel up buttons while
turning the mains on using the mains switch. See Figure 1.
5. Keep pressing the volume down and channel up buttons until the picture appears.
6. When <<SHARPX X VXX.XX>> appears on the screen, release the two buttons.
7. The receiver is now in the service mode.
To move between the various service mode functions, use the channel up and down buttons.
Use the volume buttons to change the data to the desired value.
The data will be stored automatically when exiting the service mode. To exit the service mode press the stand-by button
the remote control or turn the receiver off with the mains switch.
XXXX:
Adjustment
(Yellow)
Value
(Green)
Figure 2 Figure 3
SHARP X X VXX.XX
STS0: XXXX XXXX
STS1: XXXX XXXX
STS2: XXXX XXXX
XX:
Figure 1
MENU CH
3
4

7
21KF-80S
Service adjustment and data list
The table below shows the various service mode positions, range of values and default value. The columns are headed
as below.
Heading: Descriptions:
OSD This is what will appear on the screen at this position.
Function This is the description of the mode’s function.
Range This is the range of values that can be entered while in this mode.
Initial This is the initial value, i.e. just after changing the NVM. Shadowed values are those to be modified in
Default.
Default This is the recommended default value for this model.
FIX/ADJ If this is ADJ, then it may be necessary to adjust this value away from the default.
No. OSD Function Range Initial Default FIX/ADJ
1 AGC AGC Take Over Point 0...63 34 34 ADJ
2 V-LIN Vertical Slope [VS] 0...63 33 33 ADJ
3 V-AMP Vertical Amplitude [VA] 0...63 18 18 ADJ
4 V-CENT Vertical Shift [VSH] 0...63 17 17 ADJ
5 H-CENT Horizontal shift [HS] 0...63 34 34 ADJ
6 H-CENT60 offset to H-CENT for 60 Hz 0...31 data(-16..+15) 20 20 FIX
7 EW / / Horizontal Parallelogram [HP] 0...63 32 32 FIX
8 HB Horizontal Bow 0...63 32 32 FIX
9 S-COR S-Correction [SC] 0...63 22 30 FIX
10 DRI-RS White point Red Standard white temp. 0...63 42 42 ADJ
11 DRI-GS White point Green Standard white temp. 0...63 42 42 ADJ
12 DRI-BS White point Blue Standard white temp 0...63 42 42 ADJ
13 DRI-RW White point Red Warm white temp. 0...32 16 16 FIX
14 DRI-GW White point Green Warm white temp. 0...32 9 9 FIX
15 DRI-BW White point Blue Warm white temp. 0...32 9 9 FIX
16 DRI-RC White point Red Cold white temp. 0...32 9 9 FIX
17 DRI-GC White point Green Cold white temp. 0...32 9 9 FIX
18 DRI-BC White point Blue Cold white temp. 0...32 16 16 FIX
19 SUB-VOL Max Volume 0...63 60 60 FIX
20 SUB-CON Sub Contrast 0...63 63 63 FIX
21 SUB-COL Sub Colour 0...63 25 25 FIX
22 SUB-BRI Sub Brightness 0...63 34 34 FIX
23 TINT Sub Tint 0...63 32 32 FIX
24 SUB-SHP Sub Sharpness 0...63 11 25 FIX
25 HTL-VOL Max Hotel Volume 0...63 30 30 FIX

8
21KF-80S
No. OSD Function Range Initial Default FIX/ADJ
26 HTL-PRG Hotel Program number 0...99 or > 99 for none 255 255 FIX
27 RGB OSD RGB Reference 0...15 0 0 FIX
28 SEARCH-SYS Sound system for auto tuning 0(L-BG),1(BG),2(I),3(DK) 1 1 FIX
29 CUT-R Black Level off-set R [BLR] 0...63 0 0 FIX
30 CUT-G Black Level off-set G [BLG] 0...63 10 24 FIX
31 CDL Cathode Drive Level [CL] 0...15 5 5 FIX
32 DL-PT Y-Delay time for PAL (TV) [YD] 0...15 4 4 FIX
33 DL-ST Y-Delay time for SECAM (TV) [YD] 0...15 8 8 FIX
34 DL-4T Y-Delay time for N443 (TV) [YD] 0...15 8 8 FIX
35 COL-OP COLOUR OFFSET (PAL) 0...15 8 8 FIX
36 COL-OS COLOUR OFFSET (SECAM) 0...15 8 8 FIX
37 COL-O4 COLOUR OFFSET (NTSC443) 0...15 4 4 FIX
38 SHP-OP SHARPNESS OFFSET(PAL) 0...15 8 8 FIX
39 SHP-OS SHARPNESS OFFSET(SECAM) 0...15 4 4 FIX
40 SHP-O4 SHARPNESS OFFSET(NTSC443) 0...15 8 8 FIX
41 SC-VOL SCART volume 0..255 109 109 FIX
42 PRE-SC Prescaler SCART input 0..127 25 25 FIX
43 PRE-FM Prescaler FM/AM 0..127 72 72 FIX
44 PRE-NICAM Prescaler SCART input 0..127 90 0 FIX
45 PRE-M Prescaler SCART input for LL’ mono 0..127 3 0 FIX
46 AVC-DKY AVC Decay 0...3 data (1.2.4.8.) 1 1 FIX
47 AC-OFF-TIM Time to set the AC-OFF 0...15 0 0 FIX
timer is in steps of 10 minutes
48 DISP Language or symbols 0(symbols), 0 0 FIX
1(English),
2(French)
49 TXT-EUR Teletext pan-European language 0 (pan-europe) 0 0 FIX
1 (cyrillic)
2(Greek)
50 BKS Black Stretch 0 (disable) or 1 (enable) 1 1 FIX
51 AVC Automatic Volume Control(AVL) 0 (disable) or 1 (enable) 1 1 FIX
52 FFI Fast Filter IF-PLL 0 (disable) or 1 (enable) 0 0 FIX
53 ACL Auto Colour Limit 0 (disable) or 1 (enable) 1 1 FIX
54 S-L Sound system L 0 (disable) or 1 (enable) 0 0 FIX
55 S-DK Sound system DK 0 (disable) or 1 (enable) 1 0 FIX
56 S-I Sound system I 0 (disable) or 1 (enable) 1 0 FIX
57 S-BG Sound system BG 0 (disable) or 1 (enable) 1 1 FIX
58 BLUE-BACK Video mute at Ident loss 0 (disable) or 1 (enable) 1 1 FIX
59 VMC Video Mute at program/source Change 0 (disable) or 1 (enable) 1 1 FIX
60 HTL Hotel mode 0 (disable) or 1 (enable) 0 0 FIX
61 BTSC Reduced FM demodulator Gain (for BTSC sig) 0 (disable) or 1 (enable) 0 0 FIX
62 AV Number of external AV sources 0 for 1 AV or 1 for 2 AV 0 1 FIX
63 FMWS FM Window Selection 0 (disable) or 1 (enable) 0 0 FIX
64 SM0 Sound Mute bit 0 0 (disable) or 1 (enable) 1 1 FIX
65 SM1 Sound Mute bit 1 0 (disable) or 1 (enable) 0 0 FIX
66 AGC0 IF AGC speed bit0 0 (disable) or 1 (enable) 1 1 FIX
67 AGC1 IF AGC speed bit1 0 (disable) or 1 (enable) 0 0 FIX
68 FOA-FE Phi 1 time constant for FE(RF) 0 (disable) or 1 (enable) 0 0 FIX
69 FOB-FE Phi 2 time constant for FE(RF) 0 (disable) or 1 (enable) 0 0 FIX
70 FOA-AV Phi 1 time constant for AV 0 (disable) or 1 (enable) 1 1 FIX
71 FOB-AV Phi 2 time constant for AV 0 (disable) or 1 (enable) 1 1 FIX
72 TXT Teletext 0 (disable) or 1 (enable) 1 1 FIX
73 TXT-WE Teletext Western or Eastern characters 0 (western) or 1 (eastern) 0 0 FIX
74 FSL Forced V-SYNC slicing level 0 (disable) or 1 (enable) 0 0 FIX
75 HP2 Sync of OSD 0 for Ph1 or 1 for Ph2 0 0 FIX
76 CP Charge pump 0 (fast tuning) or 0 0 FIX
1 (moderate)
77 NICAM NICAM decoding enabled 0 (disable) or 1 (enable) 1 0 FIX
78 IGR IGR decoding enabled 0 (disable) or 1 (enable) 1 1 FIX
79 AUTO Start auto tuning at POWER-ON 0 (disable) or 1 (enable) 0 0 FIX
80 TXT-TGL Function of TXT key 0 or 1 0 0 FIX
81 EVG Enable Vertical Guard 0 (disable) or 1 (enable) 1 1 FIX

9
21KF-80S
Screen adjustment
1. G2 Adjustment
1. Enter the service mode (see page 6).
2. Use the channel up or channel down buttons to enter the << BLUE-BACK >>
function.
3. Set this to << BLUE-BACK: 0 >>, i.e. blue background is turned off.
4. Turn the set off at the mains.
5. Turn the set back on.
6. Set the picture control settings to normal.
7. Select the SCART input by pressing the TV/SCART button on the remote con-
trol. Do not connect an input to the SCART socket. A blank raster will appear.
8. Connect an oscilloscope to TP851 on the CRT PWB. The waveform as in fig-
ure 4 should be displayed.
9. Adjust the G2 control (screen voltage) so that the peak of this waveform is 3.5V
+/-0.1V above the zero volt line.
10. Enter the service mode.
11. Turn the blue background function back on again - set << BLUE-BACK: 1 >>.
12. Turn off the receiver using the mains button.
13. The G2 adjustment is now complete.
2. Focus Adjustment
1. Receive a monoscope pattern signal at a level of 60 to 80 dBµV.
2. Set the picture settings to normal.
3. Adjust the focus potentiometer to obtain maximum definition.
AGC Adjustment
1. Tune the receiver into a colour bar signal on channel E-12.
2. Set the RF generator to an output signal strength of 59 dB/µV (+/-1dBµV) –75 Ohms.
3. Connect an oscilloscope to TP201. TP201 is one end of R201.
4. Enter the service mode (see page 6).
5. Use the channel up and channel down buttons to enter the AGC mode.
6. By using the volume up and the volume down buttons, adjust the AGC until the voltage on TP201 drops by 0.1V
to 0.3V below its maximum value.
7. Change the input signal strength to 66-70dBµV and make sure that there is no noise apparent in the picture.
8. Turn the receiver off at the mains, this will exit the service mode and store the adjustment.
9
59GF
9
Figure 4

10
21KF-80S
Geometry adjustment procedure
To adjust the geometry, follow the procedure outlined below:
1. Tune the set into a Philips test pattern.
2. Enter the service mode as described on page 6.
3. Use the channel up or channel down buttons to enter the desired mode
4. Use the volume buttons to achieve correct setting.
5. When adjustments are complete, use the stand-by button to turn off the set. The adjustment values will be stored
at this point.
V-LIN
Adjust the vertical linearity control so that the picture centring is as shown in figure 5.
V-AMP
Adjust the vertical amplitude control so that the picture overscans as shown in figure 6.
V-CENT
Adjust the vertical centring control so that the picture is centred as shown in figure 7.
H-CENT
Adjust the horizontal centring control so that the picture is centred as shown in figure 8.
Figure 5
Figure 6
Figure 7
Figure 8

11
21KF-80S
Colour adjustment procedure
The following adjustments should only be carried out when the CRT or IC801 are replaced.
Notes:
1. This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 µA.
2. The red value «DRI-RS» should be fixed to 42. (Refer to “How to access service mode” section).
3. «DRI-GS» adjustment alters “Y” coordinate.
4. «DRI-BS» adjustment alters “X” and “Y” coordinates.
Adjustment method 1 (using the signal generator, varying the picture signal)
1. Adjust G2.
2. Input a white pattern with burst signal from SCART.
3. Position the colorimeter in the centre of screen.
4. Adjusting input signal level, select a luminance of 70 nits.
5. Operate again in “service mode“ and select «DRI-GS» and/or «DRI-BS» locations to obtain colour coordinates:
6. Reset the TV with the mains switch button to store the adjustment and exit service mode.
7. Check colour coordinates “X” and “Y” at 20 a 120 Nits. It may be necessary to repeat the same procedure to
obtain the above values.
Adjustment method 2 (using the signal generator, with a fixed picture signal)
1. Adjust G2.
2. Tune a white pattern with burst signal.
3. Operate in “service mode”:
4. Using «SUB-CON», select a luminance of 70 nits.
5. Operate again in “service mode“ and select «DRI-GS» and/or «DRI-BS» locations to obtain colour coordinates:
6. Select «SUB-CON». Return data to “63”.
7. Reset the TV with the mains switch button to store the adjustment and exit service mode.
8. Check colour coordinates “X” and “Y” at 20 a 120 Nits. It may be necessary to repeat the same procedure to
obtain the above values.
X=0.290 ± 0.015 Y=0.300 ± 0.015 Screen Temperature: 8550º K+1 MPCD
X=0.290 ± 0.015 Y=0.300 ± 0.015 Screen Temperature: 8550º K+1 MPCD

12
21KF-80S
HOTEL MODE FUNCTIONS
The following procedure details how to set up the Hotel Mode Functions.
1. Short Description
1.1. Hotel Mode “HTL”: Main Hotel Mode. It deactivates “Channel Setting” functions. It reduces the Maximum Volume.
1.2. Hotel Mode “HTL-VOL”: Maximum Volume Level Regulation.
1.3 Hotel Mode “HTL-PRG”: Fixing start up program when the TV set is switched on.
2. Before start
2.1. It is necessary to program “Channel Setting” before setting up Hotel Mode “HTL” because after that Channel
Setting are deactivated.
2.2. Consider that regarding TXT Features, after activate any of the Hotel modes in the “List Mode” will not be stored
any page.
2.3. Consider that changed video control values are not stored.
3. Procedure
3.1. Hotel Mode “HTL” (Main Hotel Mode).
3.1.1. Previous Service Information: Initial Value: 0. Range: 0 to 1. Service Mode Indication: HTL.
3.1.2. Access the Service Mode (see this procedure on page 6).
3.1.3. Select “HTL” by using channel up/down buttons.
3.1.4. Change initial value from “0” (off ) to “1” (on).
3.1.5. Notes:
3.1.5.1. The maximum volume level has been reduced from 60 to 30. For other value go to 3.2. Hotel Mode
“HTL-VOL”
3.1.5.2. “Channel Setting” functions have been deactivated.
3.1.5.3. It is necessary to select Hotel Mode “HTL” to be able to set up Hotel Mode “HTL-VOL” or Hotel Mode
“HTL-PRG”.
3.1.5.4. If you do not need to set up Hotel Mode “HTL-VOL” or “HTL-PRG” get out from Service Mode (To
exit the Service Mode press the stand-by button on the remote control or turn the receiver off with
the mains switch).
3.2. Hotel Mode “HTL-VOL” (Maximum Volume Level Regulation)
3.2.1. Previous Service Information: Initial value: 30. Range: 0 to 60. Service Mode indication: HTL-VOL.
3.2.2. To activate this Hotel Mode it is necessary activate previously Hotel Mode “HTL”. Then the maximum volume
level changed fro 60 to 30 as initial value.
3.2.3. Select “HTL-VOL” by using channel up/down buttons.
3.2.4. Set the value according to your necessities by using volume up/down buttons.
3.2.5. Note: If you do not need to set up Hotel Mode “HTL-PRG” get out from Service Mode (To exit the Service
Mode press the stand-by button on the remote control or turn the receiver off with the mains switch).
3.3. Hotel Mode “HTL-PRG” (Fixing start up program when the TV Set is switched on)

13
21KF-80S
3.3.1. Initial value: 255. Range: 0 to 255. Service Mode indication: HTL-PRG.
3.3.2. To activate this Hotel Mode it is necessary activate previously Hotel Mode “HTL”.
3.3.4. Select “HTL-PRG” by using channel up/down buttons.
3.3.3. The initial value to 255, ensures that the TV Set starts up in the same program number that it was been
displayed before turn it off.
3.3.4 If you want to fix other program number proceed as follows set the value according to your necessities by
using volume up / down buttons. Use values between 0 to 99. In this way, the new program number appear
fixed when you start up the TV set.
Example: If you would like to set starting program number “2”, change from 255 to 2.
3.3.5. Get out from Service Mode (To exit the Service Mode press the stand-by button on the remote control or turn
the receiver off with the mains switch).
LED FLASHING CODE
PURPOSE: The led indicates the power mode, occurred I2C error and On timer
INPUT: Current power mode
- I2C Errors
- On timer
Processing: - If in STANDBY mode and On timer inactive then switch LED off.
- If in STANDBY and On timer active set LED to blinking, (switch on and off at 1 Hz with a
50% duty cycle).
- If in POWER-ON mode, switch LED on.
- If an I2C error occurred, let the LED blink at 1 Hz, 50 % duty cycle.
For the blinking times see the Table below.
Note: Only when an I2C error occurs for a number of times, or for a number of seconds, the I2C error is
handled by the system (that is ,only then the set will go to standby, the led starts blinking).
Table Error LED blinking times
IC/Module Name Slave Address Bus Error LED Remarks Ref. No.
Blinking Time
M24C04, M24C08 A0,A2 2 512x8 EEPROM,1024x8 EEPROM IC1002
TDA935x/6x/8x 8A 3 Address of internal TV processor IC801
VTST6HD64 or C0 6 PLL Tuner TU201
CTF551 C0 6
MSP34x5G 80 5 Multistandard Sound Processor IC3001

14
21KF-80S
CHASSIS LAYOUTS
PWB A - Mother unit, F7340N8
PWB B - CRT unit, F7341N0 PWB C - Jack unit, FB758ZZ
21HS50F
21HS50C
21HS50C

15
21KF-80S
PRINTED WIRING BOARDS
F 7341N0 CRT Unit PWB. Components side.
0
1
2
3
4
Y
X
123456
0
1
2
3
4
5
6
Y
X
101 23456 7 8 9
FB758ZZ Jack Unit PWB. Component side.

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21KF-80S
F 7340N8 Mother Unit PWB. Component side
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21KF-80S
F 7340N8 Mother Unit PWB. Component side
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21KF-80S
F 7340N8 Mother Unit PWB. Copper side
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21KF-80S
F 7340N8 Mother Unit PWB. Copper side
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21KF-80S
handbook, halfpage
XXX
MXXxxx
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Fig. 3 Pin configuration (SDIP 64)
TDA935X/6X/8X PS/N2
P1.3/T1 P1.6/SCL P1.7/SDA P2.0/TPMW P3.0/ADC0/PWM0 P3.1/ADC1/PWM1 P3.2/ADC2/PWM2 P3.3/ADC3/PWM3 VSSC/P P0.5 P0.6 VSSA SECPLL VP2 DECDIG
HOUT
FBISO
PH2LF PH1LF GND3 AVL/EWD VDRB VDRA IFIN1 IFIN2
EHTO
IREF VSC TUNERAGC AUDEEM/SIFIN1 DECSDEM/SIFIN2
PLLIF IFVO/SVO
DECBG
CVBSINT VP1 CHROMA CVBS/Y GND1 AUDOUT/AMOUT
AVL/SNDIF/
BLKIN BO GO RO BCLIN R2/VIN B2/UIN G2/YIN
INSSW2
VDDA VPE VDDC OSCGND XTALIN XTALOUT RESET VDDP P1.0/INT1 P1.1/T0 P1.2/INT0
GND2 AMOUT
AUDEXT/QSSO/
SNDPLL/SIFAGC
REFO/AMOUT
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
Supply
VPsupply voltages −8.0/3.3 −V
IPsupply current −135/60 −mA
Input voltages
ViVIFrms) video IF amplifier sensitivity (RMS value) −75 −µV
ViSIF(rms) QSS sound IF amplifier sensitivity (RMS value) −60 −µV
ViAUDIO(rms) external audio input (RMS value) −500 −mV
ViCVBS(p-p) external CVBS/Y input (peak-to-peak value) −1.0 −V
ViCHROMA(p-p) external chroma input voltage (burst amplitude)
(peak-to-peak value)
−0.3 −V
ViRGB(p-p) RGB inputs (peak-to-peak value) −0.7 −V
ViYIN(p-p) luminance input signal (peak-to-peak value) −1.4 −V
ViUVIN(p-p) U/V input signal (peak-to-peak value) −1.33/1.05 −V
Output signals
Vo(IFVO)(p-p) demodulated CVBS output (peak-to-peak value) −2.5 −V
Vo(QSSO)(rms) sound IF intercarrier output in QSS versions (RMS value) −100 −mV
Vo(AMOUT)(rms) demodulated AM sound output in QSS versions (RMS
value)
−500 −mV
Io(AGCOUT) tuner AGC output current range 0 −5mA
VoRGB(p-p) RGB output signal amplitudes (peak-to-peak value) −2.0 −V
IoHOUT horizontal output current 10 −−mA
IoVERT vertical output current (peak-to-peak value) 1 −−mA
IoEWD EW drive output current 1.2 −−mA
ICs ADDITIONAL INFORMATION
TDA9350 (IC801)
Quick Reference Data
Pinning